INST.No.INE-863B KR2S
【
Communication Interface
】
Instruction Manual
-36-
7-5-7
Loop back test
Function code : 08 [08H]
The transmission check is performed between the master and slaves. The response is performed
according to the diagnosis code specified. With this unit, “Return check by transmitting the received
data as it is” is performed and the diagnosis code is fixed with “0000H”.
Example) Execution of "Loop back test" in the slave 2
<RTU mode>
Master → Instrument
Instrument → Master (Normal)
Slave address
02H
Slave address
02H
Function code
08H
Function code
08H
Diagnosis code (H)
Fixed
00H
Diagnosis code (H)
Fixed
00H
Diagnosis code (L)
00H
Diagnosis code (L)
00H
Optional data
*
Received data
*
Optional data
*
Received data
*
CRC (L)
*
CRC (L)
*
CRC (H)
*
CRC (H)
*
<ASCII mode error check>
Error check: The CRC (L) and the CRC (H) parts are as follows.
LRC
*
LRC
*
Summary of Contents for KR2S
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